How to Downgrade iPhone 3G Baseband 02.30.03 to 02.28.00

A lot of people out there mention they don’t necessarily “care” about having an unlocked iPhone 3G. The benefits of having an unlocked iPhone 3G will enable you to…

1a. Use SIM cards from any carrier. This comes in handy when you’re traveling the globe.
1b. Use your iPhone 3G with new GSM carriers in Canada once they get fully setup, enabling you to escape the wrath of Rogers.

The iPhone 3G can be unlocked via the installation of yellowsn0w via Cydia. Now, yellowsn0w requires 2.2 firmware in order to be installed. But the problem lies in 2.2.1 firmware, which includes a new baseband update.

So that means…

2.2 firmware = baseband 02.28.00 = fully unlockable with yellowsn0w
2.2.1 firmware = baseband 02.30.03 = cannot be unlocked

How to by pass this? Well, you can use PwnageTool to create a custom 2.2.1 firmware that has the 2.2 baseband (what I am on now). This will keep your baseband at 02.28.00, enabling you to unlock your iPhone.

But what about if you’re on 2.2.1 firmware and the 02.30.03 baseband? Are you out of luck? You were, but that was until a week ago 3G Baseband Downgrade was released by pH, EvilPenguin, and BigBoss.

How to Downgrade your iPhone 3G Baseband from 02.30.03 to 02.28.00

1. Find out the version of your iPhone 3G’s bootloader. If your iPhone was manufactured prior to September 2008, you are on the 5.8 bootloader. Any phones after that are on 5.9 bootloader (which means no downgrade at this point in time).

Here’s how to figure out what version you have by looking at your iPhone’s serial number:

In case you’re not sure when yours was made, you can find out by checking the serial number on the back of the device. The third, fourth and fifth digits of teh serial number show the date. If they are 8 followed by a 36 or lower (xx836xxxxxx), you should be fine. Users with the 5.9 bootloader shouldn’t have any adverse effects from running the downgrade; it should just not work for you.

2. Download 3G Baseband Downgrade via Cydia (BigBoss repo) and install it.

3gbasebanddowngrade

3. Run 3GBBD and follow the instructions. After it’s done, you should now be on the 02.28.00 baseband!
4. Install yellowsn0w to test that your iPhone now works with another carrier’s SIM!

How Will 3GBBD Benefit Me?

Well, a lot of people updated directly to 2.2.1 on their iPhone 3G within iTunes. Doing so brings the new baseband that comes with 2.2.1.

Now, with this 3G Baseband Downgrade tool you can reverse the mistake you made in the first place. Definitely worth giving it a try. Let me know how this has worked for you!

Founder and Editor-in-Chief of iPhoneinCanada.ca. Follow me on Twitter, and @iPhoneinCanada, and on Google+.

  • dashparr

    I tried this and it said “failed”. After that, my iPhone lost it’s carrier and displayed “searching…”. After a hard reset, my iPhone was back to normal but unfortunately no baseband downgrade.

  • dashparr

    I tried this and it said “failed”. After that, my iPhone lost it’s carrier and displayed “searching…”. After a hard reset, my iPhone was back to normal but unfortunately no baseband downgrade.

  • dashparr

    I tried this and it said “failed”. After that, my iPhone lost it’s carrier and displayed “searching…”. After a hard reset, my iPhone was back to normal but unfortunately no baseband downgrade.

  • dashparr

    I tried this and it said “failed”. After that, my iPhone lost it’s carrier and displayed “searching…”. After a hard reset, my iPhone was back to normal but unfortunately no baseband downgrade.

  • GregoriusM

    What carriers are going to GSM within the next 3 years that makes this worthwhile?

  • GregoriusM

    What carriers are going to GSM within the next 3 years that makes this worthwhile?

  • GregoriusM

    What carriers are going to GSM within the next 3 years that makes this worthwhile?

  • GregoriusM

    What carriers are going to be offering GSM in the next 3 years that makes this even worth considering?

  • GregoriusM

    What carriers are going to be offering GSM in the next 3 years that makes this even worth considering?

  • GregoriusM

    What carriers are going to be offering GSM in the next 3 years that makes this even worth considering?

  • Guest

    Still need some help? Check out the forums… http://www.iphoneincanada.ca/forums/showthread.php?t=5206 & http://www.iphoneincanada.ca/forums/showthread.php?t=5240
    Unfortunately there are many with 5.9 BL or even higher πŸ™

  • Guest

    Still need some help? Check out the forums… http://www.iphoneincanada.ca/forums/showthread.php?t=5206 & http://www.iphoneincanada.ca/forums/showthread.php?t=5240
    Unfortunately there are many with 5.9 BL or even higher πŸ™

  • Dusty

    Still need some help? Check out the forums… http://www.iphoneincanada.ca/forums/showthread.php?t=5206 & http://www.iphoneincanada.ca/forums/showthread.php?t=5240
    Unfortunately there are many with 5.9 BL or even higher πŸ™

  • Peter

    I downgraded but i don’t have another sim to test. But the downgrade process went smooth.

  • Peter

    I downgraded but i don’t have another sim to test. But the downgrade process went smooth.

  • Peter

    I downgraded but i don’t have another sim to test. But the downgrade process went smooth.

  • Gio

    “A lot of people out there mention they don’t necessarily β€œcare” about having an unlocked iPhone 3G.”

    I am one of those people, I change carriers once the contract expires (every 2-3 years) but I think I only switched from one carrier to another once and have been with for years since, I only travel out of the country once a year.

    My question would be: How often do you change carrier? How often do you travel to other country? How often do you make/receive phone calls when you are in some country? If you change carrier and travel more than approximately 10-15 times a year then unlocking is necessary.

    Changing carrier can be expensive since you have to break your contract and pay the penalty and transferring your number can also be a pain in the a**… if you’d be lucky you don’t have to send your “change of number” notice to each one of your contact. When I travel, I travel for vacation. I try to be disconnected to the real world and relax and that includes no phone calls from bosses or business associates (I’ll check the emails later) but if ever I need to make a phone call, I will use the phone from the hotel.

  • TK

    so what you’re probably saying is; just stick to using Skype when traveling?

  • TK

    so what you’re probably saying is; just stick to using Skype when traveling?

  • TK

    so what you’re probably saying is; just stick to using Skype when traveling?

  • skyngai

    I used to have a 2.2 3G with BB 2.28, but the mute bottun broke and I had a replacement earlier this year. They sent me a 2.21 with BB 2.30.
    My serial # is xx9093xxxxx does this mean mine is BL 5.9 and unable to do the downgrade?
    ps: This mean my phone was manufactured at 2009 week 9 right?

  • skyngai

    I used to have a 2.2 3G with BB 2.28, but the mute bottun broke and I had a replacement earlier this year. They sent me a 2.21 with BB 2.30.
    My serial # is xx9093xxxxx does this mean mine is BL 5.9 and unable to do the downgrade?
    ps: This mean my phone was manufactured at 2009 week 9 right?

  • skyngai

    I used to have a 2.2 3G with BB 2.28, but the mute bottun broke and I had a replacement earlier this year. They sent me a 2.21 with BB 2.30.
    My serial # is xx9093xxxxx does this mean mine is BL 5.9 and unable to do the downgrade?
    ps: This mean my phone was manufactured at 2009 week 9 right?

  • dashparr

    Sorry I don’t know the answer, I just wanted to say my silence button also broke earlier this year, I just glued it back together (a little loose, but no biggy). Good to know that they give you a 2.2.1 with BB 2.30, I got mine in July and have BB 2.28 with 2.2.1 firmware (thanks to pwnagetool) meaning if I care about unlocking I shouldn’t trade in my phone. My serial is xx828. I remember getting my iPhone in the 4th week of July.

  • dashparr

    Sorry I don’t know the answer, I just wanted to say my silence button also broke earlier this year, I just glued it back together (a little loose, but no biggy). Good to know that they give you a 2.2.1 with BB 2.30, I got mine in July and have BB 2.28 with 2.2.1 firmware (thanks to pwnagetool) meaning if I care about unlocking I shouldn’t trade in my phone. My serial is xx828. I remember getting my iPhone in the 4th week of July.

  • dashparr

    Sorry I don’t know the answer, I just wanted to say my silence button also broke earlier this year, I just glued it back together (a little loose, but no biggy). Good to know that they give you a 2.2.1 with BB 2.30, I got mine in July and have BB 2.28 with 2.2.1 firmware (thanks to pwnagetool) meaning if I care about unlocking I shouldn’t trade in my phone. My serial is xx828. I remember getting my iPhone in the 4th week of July.

  • ddd

    i need help mins say 83832 dose that mean its 5.9?

  • ddd

    i need help mins say 83832 dose that mean its 5.9?

  • ddd

    i need help mins say 83832 dose that mean its 5.9?

  • ddd

    i need help mins say 83832 dose that mean its 5.9?

  • We now have number portability so changing numbers from one carrier to another is quite easy. When I mention changing carriers, I am speaking about another GSM carrier that would emerge so we are not forced to choose Rogers for GSM in Canada.

    As for the travel part, it’s always handy to pop in a local SIM card into your iPhone 3G to call people you know when you’re on vacation, instead of bringing along another unlocked phone. πŸ™‚

  • We now have number portability so changing numbers from one carrier to another is quite easy. When I mention changing carriers, I am speaking about another GSM carrier that would emerge so we are not forced to choose Rogers for GSM in Canada.

    As for the travel part, it’s always handy to pop in a local SIM card into your iPhone 3G to call people you know when you’re on vacation, instead of bringing along another unlocked phone. πŸ™‚

  • We now have number portability so changing numbers from one carrier to another is quite easy. When I mention changing carriers, I am speaking about another GSM carrier that would emerge so we are not forced to choose Rogers for GSM in Canada.

    As for the travel part, it’s always handy to pop in a local SIM card into your iPhone 3G to call people you know when you’re on vacation, instead of bringing along another unlocked phone. πŸ™‚

  • JJ

    awesome, this worked for me after trying every thing else, I do travel a lot and this saves paying roaming rates while overseas, plus the fact you can use your iphone as a modem for you laptop overseas (just buy a prepaid data plan) and forward your normal number to over seas through a cheap calling plan, it makes about a 90% saving on calls.

  • JJ

    awesome, this worked for me after trying every thing else, I do travel a lot and this saves paying roaming rates while overseas, plus the fact you can use your iphone as a modem for you laptop overseas (just buy a prepaid data plan) and forward your normal number to over seas through a cheap calling plan, it makes about a 90% saving on calls.

  • JJ

    awesome, this worked for me after trying every thing else, I do travel a lot and this saves paying roaming rates while overseas, plus the fact you can use your iphone as a modem for you laptop overseas (just buy a prepaid data plan) and forward your normal number to over seas through a cheap calling plan, it makes about a 90% saving on calls.

  • Anonymous

    And it worked for me as well… great way to get the old broadband for those of us that don’t use Macs and couldn’t do the pwnge tool.

  • Anonymous

    And it worked for me as well… great way to get the old broadband for those of us that don’t use Macs and couldn’t do the pwnge tool.

  • Joost

    And it worked for me as well… great way to get the old broadband for those of us that don’t use Macs and couldn’t do the pwnge tool.

  • Vancouveriphoneunlock

    I tried on a phone with XX830XXXXXXXXX, it did not work.
    Any other suggestions?

  • Vancouveriphoneunlock

    I tried on a phone with XX830XXXXXXXXX, it did not work.
    Any other suggestions?

  • Vancouveriphoneunlock

    I tried on a phone with XX830XXXXXXXXX, it did not work.
    Any other suggestions?

  • Vancouveriphoneunlock

    I tried on a phone with XX830XXXXXXXXX, it did not work.
    Any other suggestions?

  • Jimbo2NR

    Tried on a phone 834 and didn’t work either πŸ™
    Sucks cause I’m travelling next week

  • Jimbo2NR

    Tried on a phone 834 and didn’t work either πŸ™
    Sucks cause I’m travelling next week

  • Jimbo2NR

    Tried on a phone 834 and didn’t work either πŸ™
    Sucks cause I’m travelling next week

  • Jimbo2NR

    Tried on a phone 834 and didn’t work either πŸ™
    Sucks cause I’m travelling next week

  • Bilal unlocking

    Hi ,
    I am Bilal From Pakistan ( plz help me My iphone 3G 8GB is lock ) and do not Downgrate ?

    ????????? bootloader 5.9 to bootloader 5.8 ?????????? plZ Help Sir plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

  • Bilal unlocking

    Hi ,
    I am Bilal From Pakistan ( plz help me My iphone 3G 8GB is lock ) and do not Downgrate ?

    ????????? bootloader 5.9 to bootloader 5.8 ?????????? plZ Help Sir plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

  • Bilal unlocking

    Hi ,
    I am Bilal From Pakistan ( plz help me My iphone 3G 8GB is lock ) and do not Downgrate ?

    ????????? bootloader 5.9 to bootloader 5.8 ?????????? plZ Help Sir plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

  • Bilal unlocking

    Hi ,
    I am Bilal From Pakistan ( plz help me My iphone 3G 8GB is lock ) and do not Downgrate ?

    ????????? bootloader 5.9 to bootloader 5.8 ?????????? plZ Help Sir plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz

  • Bryan

    I got 3g 16gb iphone firmware 2.2 but baseband 02.30.03 can I downgrade it to baseband 02.28.00?

  • Bryan

    I got 3g 16gb iphone firmware 2.2 but baseband 02.30.03 can I downgrade it to baseband 02.28.00?

  • Bryan

    I got 3g 16gb iphone firmware 2.2 but baseband 02.30.03 can I downgrade it to baseband 02.28.00?

  • Bryan

    I got 3g 16gb iphone firmware 2.2 but baseband 02.30.03 can I downgrade it to baseband 02.28.00?

  • sunny

    worked perfect if bootloader is not 5.9. i downgraded 7 phones base band and unlocked after. but 2 unsucess because of 5.9

  • sunny

    worked perfect if bootloader is not 5.9. i downgraded 7 phones base band and unlocked after. but 2 unsucess because of 5.9

  • sunny

    worked perfect if bootloader is not 5.9. i downgraded 7 phones base band and unlocked after. but 2 unsucess because of 5.9

  • sunny

    worked perfect if bootloader is not 5.9. i downgraded 7 phones base band and unlocked after. but 2 unsucess because of 5.9

  • maNdraKe

    ———————————————-
    **********************************************
    ||Any questions email: ex74z@yahoo.com
    ||Best way to downgrade and see if you can.
    ||1. Go Cydia
    ||2. Search for 3G Fuzzyband Downgrade
    ||3. Go on the main screen and open the app
    ||4. See if you can downgrade
    ||5. Enjoy your good old iPhone.
    ***********************************************
    ———————————————–

  • maNdraKe

    ———————————————-
    **********************************************
    ||Any questions email: ex74z@yahoo.com
    ||Best way to downgrade and see if you can.
    ||1. Go Cydia
    ||2. Search for 3G Fuzzyband Downgrade
    ||3. Go on the main screen and open the app
    ||4. See if you can downgrade
    ||5. Enjoy your good old iPhone.
    ***********************************************
    ———————————————–

  • maNdraKe

    ———————————————-
    **********************************************
    ||Any questions email: ex74z@yahoo.com
    ||Best way to downgrade and see if you can.
    ||1. Go Cydia
    ||2. Search for 3G Fuzzyband Downgrade
    ||3. Go on the main screen and open the app
    ||4. See if you can downgrade
    ||5. Enjoy your good old iPhone.
    ***********************************************
    ———————————————–

  • maNdraKe

    ———————————————-
    **********************************************
    ||Any questions email: ex74z@yahoo.com
    ||Best way to downgrade and see if you can.
    ||1. Go Cydia
    ||2. Search for 3G Fuzzyband Downgrade
    ||3. Go on the main screen and open the app
    ||4. See if you can downgrade
    ||5. Enjoy your good old iPhone.
    ***********************************************
    ———————————————–

  • thyeri

    I bought my iPhone in August 2008 but it says my bootloader version is 5.9 (when I try to downgrade baseband…).

  • thyeri

    I bought my iPhone in August 2008 but it says my bootloader version is 5.9 (when I try to downgrade baseband…).

  • thyeri

    I bought my iPhone in August 2008 but it says my bootloader version is 5.9 (when I try to downgrade baseband…).

  • thyeri

    I bought my iPhone in August 2008 but it says my bootloader version is 5.9 (when I try to downgrade baseband…).

  • Richard

    I also got my iPhone 3G new in Boston on August 2008. I have 5.9 (not 5.8)…

    I would do anything to somehow go back to 5.8. Or really grateful if anyone could figure out a way to do it with 5.9. Please keep commenting. This seems to be the most up to date thread on this subject.

    Thanks,
    Richard

  • Richard

    I also got my iPhone 3G new in Boston on August 2008. I have 5.9 (not 5.8)…

    I would do anything to somehow go back to 5.8. Or really grateful if anyone could figure out a way to do it with 5.9. Please keep commenting. This seems to be the most up to date thread on this subject.

    Thanks,
    Richard

  • Richard

    I also got my iPhone 3G new in Boston on August 2008. I have 5.9 (not 5.8)…

    I would do anything to somehow go back to 5.8. Or really grateful if anyone could figure out a way to do it with 5.9. Please keep commenting. This seems to be the most up to date thread on this subject.

    Thanks,
    Richard

  • Richard

    I also got my iPhone 3G new in Boston on August 2008. I have 5.9 (not 5.8)…

    I would do anything to somehow go back to 5.8. Or really grateful if anyone could figure out a way to do it with 5.9. Please keep commenting. This seems to be the most up to date thread on this subject.

    Thanks,
    Richard

  • steph

    omg..i wasted so many hours trying to unlock my phone..only realizing that it can’t be unlocked because of the stupid 5.9 bootloader..
    so my question out there, since i’m still a novice with my iphone..
    will a turbosim or whatever special sim work for my phone?
    or will that be limited too because of the firmware of the modem firmware?
    please let me know…if it can be unlocked via turbo sim

  • steph

    omg..i wasted so many hours trying to unlock my phone..only realizing that it can’t be unlocked because of the stupid 5.9 bootloader..
    so my question out there, since i’m still a novice with my iphone..
    will a turbosim or whatever special sim work for my phone?
    or will that be limited too because of the firmware of the modem firmware?
    please let me know…if it can be unlocked via turbo sim

  • steph

    omg..i wasted so many hours trying to unlock my phone..only realizing that it can’t be unlocked because of the stupid 5.9 bootloader..
    so my question out there, since i’m still a novice with my iphone..
    will a turbosim or whatever special sim work for my phone?
    or will that be limited too because of the firmware of the modem firmware?
    please let me know…if it can be unlocked via turbo sim

  • zac

    Hi – how do I download the 3G Fuzzyband Downgrade from Cydia if I can’t install Cydia ’cause my phone isn’t jailbroken? Is this a catch 22 or what? I bet I’m missing something simple here – can anyone help me out. I’d like to jailbreak asap πŸ™‚
    Thanks!
    Zac
    zacprairie@yahoo.ca

  • zac

    Hi – how do I download the 3G Fuzzyband Downgrade from Cydia if I can’t install Cydia ’cause my phone isn’t jailbroken? Is this a catch 22 or what? I bet I’m missing something simple here – can anyone help me out. I’d like to jailbreak asap πŸ™‚
    Thanks!
    Zac
    zacprairie@yahoo.ca

  • zac

    Hi – how do I download the 3G Fuzzyband Downgrade from Cydia if I can’t install Cydia ’cause my phone isn’t jailbroken? Is this a catch 22 or what? I bet I’m missing something simple here – can anyone help me out. I’d like to jailbreak asap πŸ™‚
    Thanks!
    Zac
    zacprairie@yahoo.ca

  • zac

    Hi – how do I download the 3G Fuzzyband Downgrade from Cydia if I can’t install Cydia ’cause my phone isn’t jailbroken? Is this a catch 22 or what? I bet I’m missing something simple here – can anyone help me out. I’d like to jailbreak asap πŸ™‚
    Thanks!
    Zac
    zacprairie@yahoo.ca

  • Bashir

    hi, i just i have iphone 3g with frimware 2.2.1 and 5.9 bootloader unlucky:( i have one question if i downgrade my frimware to 2.2.0 my bootloader will chage or not plz help me thanks in advance

  • Bashir

    hi, i just i have iphone 3g with frimware 2.2.1 and 5.9 bootloader unlucky:( i have one question if i downgrade my frimware to 2.2.0 my bootloader will chage or not plz help me thanks in advance

  • Bashir

    hi, i just i have iphone 3g with frimware 2.2.1 and 5.9 bootloader unlucky:( i have one question if i downgrade my frimware to 2.2.0 my bootloader will chage or not plz help me thanks in advance

  • thyeri

    Anyone heard about Rebel Turbo SIM??? It says it works with 5.9 bootloader. I bought one and I hope it is going to work!

    http://www.wholesalechinabuy.com/products/Rebel-SIM-Card-for-iPhone-3G-2.2.1-Yellow.html

  • thyeri

    Anyone heard about Rebel Turbo SIM??? It says it works with 5.9 bootloader. I bought one and I hope it is going to work!

    http://www.wholesalechinabuy.com/products/Rebel-SIM-Card-for-iPhone-3G-2.2.1-Yellow.html

  • thyeri

    Anyone heard about Rebel Turbo SIM??? It says it works with 5.9 bootloader. I bought one and I hope it is going to work!

    http://www.wholesalechinabuy.com/products/Rebel-SIM-Card-for-iPhone-3G-2.2.1-Yellow.html

  • thyeri

    Anyone heard about Rebel Turbo SIM??? It says it works with 5.9 bootloader. I bought one and I hope it is going to work!

    http://www.wholesalechinabuy.com/products/Rebel-SIM-Card-for-iPhone-3G-2.2.1-Yellow.html

  • Guest

    There is no way to downgrade a BL 5.9 right now, even playing with FW’s. 5.8 BL is the only BL u can downgrade and then unlock.
    Read the DEV TEAM blog for more info… http://blog.iphone-dev.org/post/74278878/close-the-stable-door
    Read here… http://www.iphoneincanada.ca/forums/showthread.php?t=5320

  • Guest

    There is no way to downgrade a BL 5.9 right now, even playing with FW’s. 5.8 BL is the only BL u can downgrade and then unlock.
    Read the DEV TEAM blog for more info… http://blog.iphone-dev.org/post/74278878/close-the-stable-door
    Read here… http://www.iphoneincanada.ca/forums/showthread.php?t=5320

  • Dusty

    There is no way to downgrade a BL 5.9 right now, even playing with FW’s. 5.8 BL is the only BL u can downgrade and then unlock.
    Read the DEV TEAM blog for more info… http://blog.iphone-dev.org/post/74278878/close-the-stable-door
    Read here… http://www.iphoneincanada.ca/forums/showthread.php?t=5320

  • Dusty

    I dont pay any attention to SIM Unlocks now a days, so I couldnt say which is best. Let us know how it goes when it arrives πŸ˜‰

  • Guest

    I dont pay any attention to SIM Unlocks now a days, so I couldnt say which is best. Let us know how it goes when it arrives πŸ˜‰

  • Guest

    I dont pay any attention to SIM Unlocks now a days, so I couldnt say which is best. Let us know how it goes when it arrives πŸ˜‰

  • dena_i_trent

    Ihave tried on iphone serial # xx832xxxxxx, it says me that i’m on BL 5.9. and I purchesd my iphone way before Sept.

  • dena_i_trent

    Ihave tried on iphone serial # xx832xxxxxx, it says me that i’m on BL 5.9. and I purchesd my iphone way before Sept.

  • dena_i_trent

    Ihave tried on iphone serial # xx832xxxxxx, it says me that i’m on BL 5.9. and I purchesd my iphone way before Sept.